What kind of plugs come stock on the 335?Has anyone tried running a set of ngk's people got better results using them on bossted M3s and wondered if they would alow a little more timing

The N54 uses a Bosch spark plug. It's a 12mm thread which is different from other plugs that BMW uses which is a 14mm design. The hex on the spark plug is not your typical 6 point design but rather a 12.

BMW says a special tool us used to removed the spark plug. The socket needs to be thin as well as there isn't enough space on the N54 cylinder head to accept a typical spark plug socket.

I'll try to get more information tomorrow on the spark plug and see if NGK offers anything.

What kind of plugs come stock on the 335?Has anyone tried running a set of ngk's people got better results using them on bossted M3s and wondered if they would alow a little more timing

Colder plugs would only help if the stock plugs were causing detonation. I dont think thats a problem with the N54. M3's came with relatively hot plugs from the factory in a NA configuration, which is why guys using forced induction did a little better with a more suitable plug. BMW designed the 335 engine for high compression and boost, which would include much cooler plugs than they would use in a NA engine.

Colder plugs would only help if the stock plugs were causing detonation. I dont think thats a problem with the N54. M3's came with relatively hot plugs from the factory in a NA configuration, which is why guys using forced induction did a little better with a more suitable plug. BMW designed the 335 engine for high compression and boost, which would include much cooler plugs than they would use in a NA engine.

+1... I was just going to say the same thing. I also switched to NGK copper plugs that were two steps colder then stock on my s2k after I went turbo.